The most commonly reported adverse reactions during treatment are abdominal pain and diarrhoea.
Immune system disorders: Anaphylactic reactions, angioedema, hypersensitivity.
Metabolism and nutrition disorders: Dehydration.
Nervous system disorders: Dizziness, syncope.
Dizziness and syncope occurring after taking bisacodyl appear to be consistent with a vasovagal response (e.g., to abdominal spasm, defecation).
Gastrointestinal disorders: Abdominal cramps, abdominal pain, diarrhoea, nausea, haematochezia (blood in stool), vomiting, abdominal discomfort, anorectal discomfort, colitis including ischaemic colitis.